Engraving machine



July 24, 1951 o. BACHMANN ENGRAVING MACHINE Filed June 50, 1945 8 Sheets-Sheet l July 24, 1951 o. BACHMANN ENGRAVING MACHINE 8 Sheets-Sheet 2 Filed June 30, 1945 Ma w M, 5 WA asmma 8 Sheets-$hee 5 Filed June so, 1945 OGOOOOOOOOOOOOO 0. BAQHMANN ENGRAVING MACHINE July 24;. 1951 Filed June 50, 1.945

OQOOOOOOOOOOOOO 000000000000000 000000000000000 y 1951 o. BACHMANN 2,561,436

ENGRAVING MACHINE Filed June so, 1945 Y a Sheets-Sheet 5 a e 1.. I

July 24, 1951 o. BACHMANN 2,561,436

ENGRAVING MACHINE Filed June 50, 1945 8 Sheets-Sheet 6 Judy 24 1951 o. BACHMANN 2,561,436

ENGRAVING MACHINE I Fild June so, 1945 s sheets-sheet 7 y 1951 o. BACHMANN 2,561,436

ENGRAVING MACHINE Filed June 30, 1 945 8 Sheets-Sheet 8 Patented July 24, 1951 OFFICE ENGRAVING MACHINE Oscar Bachmann, Zurich, Switzerland Application June 30, 1945, Serial No. 602,616 In Switzerland May 16, 1944' The present invention relates to a new and improved machine ior engraving plates for producing patterns to be reproduced by any known and suitable process.

The invention resides in an engraving machine having motor drivenchange speed gearoperating a pantograph connected to the plate to be engraved. A stylii carrier is arranged on the plate and carries a plurality of engraving stylii of which several or all may be set to trace curves on the plate.

In the accompanying drawing apreferred embodiment of the machine is shown by way of example:

Fig. 1 is a side elevation and Fig. 2 a top view of the new machine Fig. 3 is a cross-section on the line 3-3 of Fig. 2 and Figs. 4 to 6 are, respectively, sections taken on the lines 4-4, 5-5 and 6--B of Fig. 3.

Fig. 10.

Figs. 12 to 14 show details of construction in a diagrammatic manner and Figs. 15 to 36 represent some of the designs which may be produced by the new machine.

The machine comprises a table with a plate 2 below which a motor 3 is arranged driving, by a belt 4 and pulley, a shaft 5. n the shaft a bevel pinion 6 is mounted meshing with a; bevel gear I (Fig. 3). The bevel gear 1 is connected by means of a bolt 9 with a hollow shaft l0 rotatably mounted in a casing I2 fixed to the table plate 2. On the upper end of the hollow shaft ||l a carrier .|3 is rotatably mounted on which two toothed gears M are rotatably mounted. The gear I4 are in mesh with an internally toothed ring l5 and with a toothed gear IS. The internally .toothed ring I5 is fixedly secured to a disk ll which is rigidly connected to the hollow shaft Ill.

'The gear I 6 is fastened to a shaft 18 rotatably mounted in the hollow shaft l0. On the shaft 8, the gears 20, 2|, 22 are loosely mounted, any one of which may be coupled at will with the shaft l8 by means of a radially and axially displaceable key 25 which may be operated by a hand lever 24. The lower end of said shaft I8 is journalled in a support 26 carrying the pivot2l of the lever 6 Claims. (01. 33-47) 24. Each of the gears 20, 2| 22 is in engagement respectively with a gear 29,30, 3| mounted on the support 26. The gears 29, 30, 3| are in mesh respectively with internally toothed annular gears 33, 34, 35 rigidly connected with the bevel gear 1.

On the carrier |3( Fig. 4:) two supports 40 are fastened on which a disk 4| is movably mounted by means of two sliding pieces43. On the disk 4| a guide piece 38 is fastened by a screw bolt 31. The guide piece 38 is slidably arranged in a slot 39 (Fig. 6) of a plate 44 carrying two stop pieces 45 arranged on two bolts 41. The stop pieces 45 run in'guides 46 each fixed on a gear wheel l4. On dish 4| two screw threaded bolts 48 are mounted, each being provided with a head 49 and being adjustable as 'to depth to which they enter grooves 52 in the support 40. They are adjusted and held 'in theirposition by means of nuts 50. On the disk 4| a member 53 is rotatably mounted "for adjustment, and has a rod 54 secured thereto.

on therod 54is arranged a slide 55 provided with a sleeve 56. By a screw bolt 51, passing through f sleeve"56the slide 55 may be fastened on the rod 54; r

On the sleeve 56 two rods 59 of a pantograph are mounted. The said rods 59 project in opposite directions; the outer ends thereof rest by means of rollers 58' (Fig. 1) on the table2. To each of the rods 59 (Figs. 1, 2) two rods 60; 5| are pivotally connected by one end. The free end of the rods 60 are each connected. with a bearing 63 (Figs. 2, 10, 11) and the free end of each rod 6| is connected to a lever 64 (Fig. 2). The levers 64 are pivotally mounted on a plate 8|] (Figs. 2, '7, 8, 9) which is mounted on balls 8| and which may be moved within certain limits on the table 2. The rods 64 are connected with the rods 6|] by swivel joints. Each. of the bearings B3 is slidably mounted inv a groove 65a of .a. bar 65. In each of the bearings 63 a roller 66 is mounted which by the action of a spring 51 is constantly kept in contact with a cam 68. The bar 65 isfixed on a shaft 69 passing through a bore of cam 62. The cams 58 are changeably mountedon the table 2; they are preferably com- I posed of two parts. Each shaft 69 carries a bevel wheelfll (Figs. 11 12) each meshing with another bevel ear 12 on shaft 13. On each of the shafts 13 other bevel gears 14 are fastened meshing with a gear l5 fixed to shaft 16. The latter is in engagement by a bevel gear 11 which is in mesh with the gear 1. The shaft 16 is bi-partite, the part are interconnected by a clutch 18, so that the drive of the bearing 53 may be interrupted when desired. i

for instance, of glass or metal, are arranged on which the patterns are to be produced. On the table top 2 a holder for the stylus 84 is mounted by means of a hinge 82 (Figs. 7, 8, 9). The holder comprises a table 83 and above same a plate or carrier 85 adapted to receive the stylus 84 and below same a guide plate or carrier Bl. The plate or carrier 85 rests on lugs 88 on the table 83 and may be lifted by means of a handle 90. By-tilting the handle 90 from the upright position shown I in Fig. 7 into the horizontal position four earns: 92

are moved raising the plate or earlier .85 withthe styli mounted thereon. By doing so all the styli 34 are brought out of their working position: I

in their axial direction. The cover plate 83 rests on two supports 93 (Fig. 8) and iShEldQfilIIflY in its position by screw bolts 95 and nuts '84. A handle 96-is provided to assist the lifting of the-members 83, 85, 81 and the turning of the same on the hingeBZ. By raising the said platesa hook 98 passes under a projection 99 and secures the holder of the-styli in raised or slanting position. In this position the table 80- is free to. be worked on; Each of the plates or carriers 85-, 81 is provided with an s55. in which styli 84 maybe arranged. these styli samples or the patterns may he produced on a small plate fastened on an extension 13 of the table. 8.0. The said styli moreover allow tie examination-of the- .patterns produced when the machine is working without stopping the machine.

- Toproduce a great number of patterns simul- 'taneously the table 8|] is provided with the auxiliary :device shown in. Figs. 13 and 14. g on the table .80 two guide ways III) are fixed: in which a plate is sli-dably mounted. plate |--l-.|- is provided with two guide ways! l2, the latter run at a right angle with reference to the guide ways In the guide way H2 'a plate H3 is. slidahly' gears 33., 34, .35 .drive by the intermediategears 25, 3| the wheels 20, 2 I, 22. As shown in Fig.3 the wheel 2| drives by means of the key .25 the shaft l8 and therewith the toothed gear H5. The

gear-s14, |.5,, IB-ilorm a difierential gearing; The gears 14, 1.5 .on the support |;3 rotate about their axes and also travel bodily about the axis .of the shattsxlll, 18. The guiding means 4.6 attached to thegears l4, l5 force the holder 44 totake part in their bodily movement by the members. .and 4-l. .In Fig. 3 the sleeve 56is co-axially arranged with [reference to .shaftltand the bolts 4.! are co- 53 and 55. The axes of the bolts 41 are thus moved out of centre with respect to the gears l4 and perform a circular path which motion is transmitted by the parts 44, 4|, 53, 54, 55, 'and by the pantograph to the plate 80. The movement of this plate is composed of two circular movements and each stylus will engrave a loop A, Fig. 15, on said plate 80. If by lever 24 the key 25 is brought into engagement with gear 22 or 25-, the speed of the shaft l8 and therewith of the wheels l6 and I4 and of the parts 44, 5|, 53 to 56 will be varied. Foreach full turn a greater or a fewer number ofloops may be produced on the plate 80. When the heads 49 are positioned :asshown in'Fig. 4., the disk 4| is free to travel a path equal to the length of the slot 38-. The movement ofthe disk can, however, be limited by positioning the heads 49 in the grooves 52 by means ofth'e nuts 50. Because of the shape of the heads 49 and grooves 52, the movement of the disk 4| .canbe variably limited according to the setting of the head 49. By rotating the gears I5, I 5 the members 44., 4|, 55 of the device are turned and the disk 4| is displaced in the slot 39- on the support. From. the rotary and the linear'motions of the said members a resultant motion. of the slide=55=is produced so that a curve like a closed sine .curve shown in Fig. 16 isengrav'ed on the plate :80. .lvlore or less curves may be drawnon v 0.

each rotation according to the position of the key 25. V

.By displacing the members 49 by means of the .nut 50 only so much that they project into the grooves 52 but do not bear on the lateral walls, the slanting faces of, the-grooves 52 strike alternately-onthe members 49 during therotation of the carrier l3. Owing to that the sine curve will be deformed as shown in Fig. 17. The

distortion of the curve corresponds to the setting of the member 49 within the groove 52, as previously described with regard to Fig. 4;.

"If somev members of the pantograph are not uniformly displaced apattern as shownin Fig. 15

. shape of the cams 68 to plate .80.

axial with respect to the gears l4. .If the member53 is rotated the sleeve 56 will turn about its own axis, but will not move bodily. The pantograph connected therewith is notmoved at all and the ,plate 80 remains at rest. By moving the slide 55 on the rod 54 the said slide 55 performs a circular ,path @around the axis .of theshafts 1| 0., I8. Thismovement is transmitted to the plate and each stylus now performs work on :said

,plate by engraving a circle thereon. By turning the screw 42 (Figs. 3,5) the stops45 are :displaced in their guides and therewith thepartsfl 'l, 44, L41,

*tion.

will be produced. The loops are' tracedin an elliptic path. Instead of loops sine curvesmav l5, l4, H and therewith both the bars .65

land-bearing- 63 are turned. As the rollers .66 of the pantograph run. on. the circumference of 'thecams .58 the said pantograph transmits the The pattern produced is. shown in Fig. .20.

In Fig. .21 a pattern is shown which has been produced by thirty-five 'styli. Each. stylus has to produce in a first operation the inner figure andin a second operation the outer closed line;

The pattern shown in Fig. 22 has been produced in three consecutive operations, eachstylus has to trace one closed curved line in one operathe pattern "had been combined to that shown Fig. 23iby subsequently printing. The pattern vshownin. Figs. 24, 25 maybe reproduced in difcolours.

agseigaac By displacing one of theslides I l l or H3 (Figs. 13. 14) the pattern may be placed to overlap each other or to superimpose one on the other as shown in Figs. 26 and 2'7. ,The size, of the individual patterns might be varied by turning the screw 42.

By making use of the two auxiliary plates HI and lit the two patterns can be arranged in an oblique direction as illustrated in Fig. 28.

Fig. 29 shows a corner of a border in which the pattern isrepeated. By placing a plurality of styli at regular distances apart and in rows according to the design the whole pattern may be produced. i

The patternshownin Fig. 30 has been produced in the following manner: At first only eachsecond stylus of a row of styli is set to pro duce the larger rosettes of the border. Each of said rosettes is traced in five separate operations. After said figures have been completed the styli are displaced and the smaller figures ar ranged between the finished parts are now traced in five operations.

Fig. 31 shows a pattern composed of the two ornaments shown in the Figs. 32 and 33. This pattern may be reproduced in two colours.

In Fig. 34: a rosette is shown which may be used at the centre of a larger pattern. To obtain the pattern the plate on which the curves are to be traced is mounted on the disk Q iii.

A similar rosette is shown in Fig. 35 which has been produced by making use of the disk H 5. Four styli are used simultaneously at equal distances apart and from the centre of the disk i I5. Having completed a part of the pattern the disk I I is displaced for a certain angle until the whole pattern is complete after a turn of the disk through 90 degrees.

The pattern shown in Fig. 36 may be produced by making use of the means described and in the manner aforesaid.

Beside the pattern shown and described a great variety of other curves and pattern may be produced which are of a highly ornamental character and which are not to be copied.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. In an engraving machine, the combination with styli and a pattern plate adjustably mounted with respect to the machine proper, of a positively driven change speed. gear, a disk slidably mounted with respect to said plate and arranged to be moved by said gear through an adjustable stroke, a plurality of cams, two bearings slidably mounted with respect to said plate, a pantograph mounted in said bearings, a driver mechanism connecting said disk to said pantograph, said bearings being arranged to cooperate with said cams to form the pattern according to the outline of said cams, means for connecting said pantograph to said plate to receive the pattern tracings by said styli, and a plurality of members adjustable with respect to said driver mechanism for attaining at least one distortion of the pattern.

2. In an engraving machine, the combination with styli and a pattern plate adjustably mounted with respect to the machine proper, of a positively driven change speed gear, a disk slidably mounted with respect to said plate and arranged to be moved by said gear through an adjustable stroke, a plurality of cams, two bearings slidably mounted with respect to said plate, a pantograph mounted in said bearings, a driver 6 mechanism connecting said disk to said pantograph, said bearings being arranged to cooperate with said cams to form the pattern according to the outline of said cams, means for connecting said pantograph to saidplate to receive the patterntracingsby said styli, a plurality of membersadjustable with respect to said driver mechanism and other members coo-perable with said adjustable "members in such manner that adjustment of said adjustable member resultsin a break in thecurves being traced or a distortion of the pattern is obtained.

3. In an engraving machine, the combination with styli and a pattern plate adjustably mounted with respect to the machine proper, of a positively driven change speed gear, a disk slidably mounted with respect to said plate and arranged tobe moved by said gear through an adjustable stroke, a plurality of cams, two bear ings "slidably' mounted with respect to said plate, a pantograph mounted in said bearings, a driver mechanism connecting said disk to said pantograph, said bearings being arranged to cooperate with said cams to form the pattern according to the outline of said cams, means for connecting said pantograph to said plate to receive the pattern tracings by said styli, a plurality of members adjustable with respect to said driver mechanism, said members being mounted on said driver mechanism and being adjustable with respect to each other in such manner that parts of the pattern are traced in more or less oblique positions.

4. In an engraving machine, the combination with styli and a pattern plate adjustably mounted with respect to the machine proper, of a positively driven change speed gear, a disk slidably mounted with respect to said plate and arranged to be moved by said gear through an adjustable stroke, a plurality of cams, two bearings slidably mounted with respect to said plate, a pantograph mounted in saidbearings, a driver mechanism connecting said disk to said pantograph, said bearings being arranged to cooperate with said cams to form the pattern according to the outline of said cams, means for connecting said pantograph to said plate to receive the pattern tracings by said styli, and a member rotatably mounted for adjustment on said plate.

5. In an engraving machine, the combination with styli and a pattern plate adjustably mounted with respect to the machine proper, of a positively driven change speed gear, a disk slidably mounted with respect to said plate and arranged to be moved by said gear through an adjustable stroke, a plurality of cams, two bearings slidably mountedwith respect to said plate, a pantograph mounted in said bearings, a driver mechanism connecting said disk to said panto graph, said bearings being arranged to cooperate with said cams to form the pattern according to the outline of said cams, means for connecting said pantograph to said plate to receive the pattern tracings by said styli, a second plate mounted on said pattern plate, and a third plate mounted on said pattern plate, said second plate and. said third plate being arranged on said pattern plate so as to be adjusted at right angles to each other.

6. In an engraving machine, the combination with styli and a pattern plate adjustably.

mounted with respect to the machine roper, of a positively driven change speed gear, a disk woman slidably mounted with respect to said plate and arranged to be moved by said gear through. an adjustable stroke, a plurality of cama; two bearings slidably mounted with respect to saidplate,

' a-pantograph mounted in said bearings, a driver mechanism connecting said disk to, said pantograph, said bearings being arranged to cooperate with said cams to form the pattern according to the outline of said cams, means for con,-v necting said pantograph to said plate to, receive the pattern tracings by said styli, aplurality of members adjustable with respect, to saiddriver mechanism for attaining at least one distortion of the pattern and carriers for the styli provided. with an arm adapted to receive at least one stylus, said last named stylus being arranged to operate on said plate in. such manner as to allow examination of the work of said styli whilev the same are at work.

OSCAR BACl-IMANN.

8, REFERENCES CITED The "following references areof record in the file of this patent: I

UNITED STATES PATENTS 

